org.xcmis.search.content.interceptors
Class QueryProcessorInterceptor

java.lang.Object
  org.xcmis.search.content.interceptors.AbstractVisitor
      org.xcmis.search.content.interceptors.CommandInterceptor
          org.xcmis.search.content.interceptors.QueryProcessorInterceptor

All Implemented Interfaces:

Visitor, Startable

public class QueryProcessorInterceptor
extends CommandInterceptor

A query engine that is able to execute formal queries expressed in the Abstract Query Model.

Constructor Summary

QueryProcessorInterceptor(QueryExecutionPlaner planner, Optimizer optimizer)
Create a new query engine given the planner, optimizer, processor.

Method Summary

List<ScoredRow>	execute(InvocationContext ctx, QueryExecutionContext context, org.xcmis.search.model.Query query) Execute the supplied query by planning, optimizing, and then processing it.
Object	visitProcessQueryCommand(InvocationContext ctx, ProcessQueryCommand command)

Methods inherited from class org.xcmis.search.content.interceptors.CommandInterceptor

getNext, handleDefault, hasNext, invokeNextInterceptor, setNext, start, stop

Methods inherited from class org.xcmis.search.content.interceptors.AbstractVisitor

visitChildEntriesCommand, visitExecuteSelectorCommand, visitGetContentEntryCommand, visitGetUnfiledEntriesCommand, visitModifyIndexCommand

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QueryProcessorInterceptor

public QueryProcessorInterceptor(QueryExecutionPlaner planner,
                                 Optimizer optimizer)

Create a new query engine given the planner, optimizer, processor.

Parameters:

planner - the planner that should be used to generate canonical query plans for the queries;

optimizer - the optimizer that should be used to optimize the canonical query plan

Throws:

IllegalArgumentException - if the processor reference is null

Method Detail

visitProcessQueryCommand

public Object visitProcessQueryCommand(InvocationContext ctx,
                                       ProcessQueryCommand command)
                                throws Throwable

Specified by:

visitProcessQueryCommand in interface Visitor

Overrides:

visitProcessQueryCommand in class AbstractVisitor

Returns:

Throws:

Throwable

See Also:

AbstractVisitor.visitProcessQueryCommand(org.xcmis.search.content.command.InvocationContext, org.xcmis.search.content.command.query.ProcessQueryCommand)

execute

public List<ScoredRow> execute(InvocationContext ctx,
                               QueryExecutionContext context,
                               org.xcmis.search.model.Query query)

Execute the supplied query by planning, optimizing, and then processing it.

Parameters:

ctx -

context - the context in which the query should be executed

query - the query that is to be executed

Returns:

the query results; never null

Throws:

IllegalArgumentException - if the context or query references are null